The New York Times is reporting today that the U.S. Senate Commerce Committee will hold hearings on how Internet marketers and ISP can track your surfing behavior. Watchdog agencies are suggesting that some are violating federal law. NebuAd, an Internet marketing company that works with ISPs to help track web activity is providing a way for Web users to "opt-out" of being tracked. There was no discussion in the article of how ISPs are now geotargeting Web activity but some of those commenting on the article recognized the use of IP-based location-based advertising. Once you know 'what' and 'who,' the next question is always 'where.'